1. Lesson 1.1: Variables and Expressions Mrs. Funda
Algebra I
Lesson 1.1: Variables and Expressions
Mrs. Funda

2. Objective : Write verbal expressions for algebraic expressions,
Write algebraic expressions for verbal expressions

3. VOCABULARY algebraic expressions variables term factor product power
exponent
base

4. Real world applications

5. Real world applications
A chocolate bar costs 3 Drh
2 bars :
5 bars:
n-bars:

6. Definitions
Variable – A variable is a symbol to represents a number or value.
8 + n = 12

7. Definitions A variable can use any letter of the alphabet. n + 5 x – 7
w - 25

8. Definitions
An Algebraic expression – consiss of sums and/or products of numbers and variables.
m + 8
r – 3

9. EXPONENTS:
x^5: x to the 5th power

10. Words That Lead to

11. Addition x+y More than : ‘ x more than y’ Sum of: ‘sum of x and y’
Plus: ‘x plus y’
Increased by: ‘x increased by y’
Added to : ‘x added to y’

12. Subtraction x-y Less than: ‘y less than x’
Subtracted from: ‘y subtracted from x’
Decreased by: ‘x decreased by y’
Difference: ‘difference of x and y’
Minus: ‘x minus y’

13. MULTIPLICATION xy Product of: ‘product of x and y’
Multiplied by: ‘x multiplied by y ’
Times : ‘x times y’
of: ‘x of y

14. MULTIPLICATION x/y Quotient of : ‘the quotient of x and y ’
Divided by: ‘x divided by y ’

15. Write Algebraic Expressions for These Word Phrases
Ten more than a number
A number decrease by 5
6 less than a number
A number increased by 8
The sum of a number & 9
4 more than a number

16. Write Algebraic Expressions for These Word Phrases
Ten more than a number
A number decrease by 5
6 less than a number
A number increased by 8
The sum of a number & 9
4 more than a number
n + 10
w - 5
x - 6
n + 8
n + 9
y + 4

17. Write Algebraic Expressions for These Word Phrases
A number s plus 2
A number decrease by 1
31 less than a number
A number b increased by 7
The sum of a number & 6
9 more than a number

18. Write Algebraic Expressions for These Word Phrases
A number s plus 2
A number decrease by 1
31 less than a number
A number b increased by 7
The sum of a number & 6
9 more than a number
s + 2
k - 1
x - 31
b + 7
n + 6
z + 9

19. Write an Algebraic Expression for These Situations
Scott’s brother is 2 years younger than Scott
The sum of two numbers is 12
The difference between two numbers is 5
s - 2
v + c = 12
m – n = 5